Melamed, Samuel (2026) Long-wavelength activation of Feringa-type molecular motors by triplet sensitizers. Bachelor's Thesis, Applied Physics.
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Abstract
Ever since their first description in 1999, molecular motors have shown immense potential in the field of molecular machines, promising to act as the groundwork for their actuation. A large barrier inhibiting the realization of the potential of these motors is their requirement of blue or UV light in their activation. Due to the poor penetrability of short wavelength light in skin, and its capacity to cause genetic damage and cell death, this limits the application of molecular motor based machines in medicine. This research aimed to contribute to the ongoing research of using the lower lying triplet energy level of molecules to red-shift the photon energy needed to induce motor action. In particular, the capacity of triplet-triplet energy transfer (TTET) and triplet-triplet annihilation based up-conversion (TTA-UC) to induce motor action in a second generation molecular motor was tested using palladium octabutoxy phthalocyanine (PD) as a triplet sensitizer and rubrene as an annihilator. By comparing the difference in the absorption spectrum of the TTET and TTA-UC trials with that of motor action, motor action was not observed in either of the triplet conditions. Because TTET could not be observed from PD to the motor, the triplet energy of PD could be used to increase the lower bound on the triplet state of the motor ( 1.26 eV < E(T) ). With this new lower bound, optimizations in the selections of triplet sensitizers for the particular motor can be made in future research.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Pchenitchnikov, M.S. |
| Degree programme: | Applied Physics |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 09 Jul 2026 12:55 |
| Last Modified: | 09 Jul 2026 12:55 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/37413 |
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